USB: MUSB: Be sure that we enable musb->clock

If CONFIG_OMAP_RESET_CLOCKS is enabled, musb->clock would
be disabled because nobody was enabling it.

Be sure that omap2430.c enables musb->clock to avoid problems
later.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/usb/musb/omap2430.c

@@ -246,6 +246,9 @@ int __init musb_platform_init(struct musb *musb)
 
 int musb_platform_suspend(struct musb *musb)
 {
+	if (!musb->clock)
+		return 0;
+
 	/* in any role */
 	OTG_FORCESTDBY_REG &= ~ENABLEFORCE; /* disable MSTANDBY */
 	OTG_SYSCONFIG_REG &= FORCESTDBY;	/* enable force standby */
@@ -257,14 +260,27 @@ int musb_platform_suspend(struct musb *musb)
 	if (musb->xceiv.set_suspend)
 		musb->xceiv.set_suspend(&musb->xceiv, 1);
 
+	if (musb->set_clock)
+		musb->set_clock(musb->clock, 0);
+	else
+		clk_disable(musb->clock);
+
 	return 0;
 }
 
 int musb_platform_resume(struct musb *musb)
 {
+	if (!musb->clock)
+		return 0;
+
 	if (musb->xceiv.set_suspend)
 		musb->xceiv.set_suspend(&musb->xceiv, 0);
 
+	if (musb->set_clock)
+		musb->set_clock(musb->clock, 1);
+	else
+		clk_enable(musb->clock);
+
 	OTG_FORCESTDBY_REG &= ~ENABLEFORCE; /* disable MSTANDBY */
 	OTG_SYSCONFIG_REG |= SMARTSTDBY;	/* enable smart standby */
 	OTG_SYSCONFIG_REG &= ~AUTOIDLE;		/* disable auto idle */